"On February 10, 2010, the University at Buffalo Medical Center released a press release describing preliminary results from an ongoing study led by Dr. Robert Zivadinov combining the use of transcranial and extracranial venous doppler evaluation in people with MS and controls, with the aim of evaluating the prevalence of venous obstruction in people with MS. [...] The results reported are based on the first 500 participants in the Combined Transcranial and Extracranial Venus Doppler Evaluation study.
The preliminary results reported that at least 55 percent of the MS cohort participating in the initial phase of the study showed narrowing of the extracranial veins causing restriction of normal outflow of blood from the brain. This was also true for at least 22 percent of the healthy controls."
So it looks like the MS research community has significant interest in this, and that early reports from a larger study confirm an association between the disease and venous blockage.
---
edit: and on the other hand...
http://medicalmyths.wordpress.com/2009/11/24/the-zamboni-myt...